Customer Ratings & Reviews

I have used exclusively synthetic oil since it became available many years ago. I believe AmsOil is the best synthetic available at this time. Less oil consumption and smoother engine operation.

Only oil I've used

Best oil ever. Use in my oil burning jeep. Oil use has dropped considerably. Great product. Love it and jeep now.

I have 120,000 miles on my vehicle. 0W-20 has out performed my expectations. Changed every 12,000 miles.

I use Amsoil in my Nissan Frontier, 4 wheeler and snowblower & lawnmower. I wouldn't use anything else. It never fails, always slippery, and allows high mileage between changes. I'm a lifer! Thank you AMSOIL!

I drive my vehicles in excess of 40,000 hard miles a year and have put several hundred thousand miles on each. Use Amsoil in the engine, transmission and gear boxes and have never had a single maintenance issue.

Amsoil Synthetic Diesel Oil is the only oil I use in my 2007 Dodge Ram 2500. Very trusted oil, good folks that work win.

I use this in my Turbo Honda Civic 400+ Hp. At normal drain intervals and hasn't failed me yet excellent gas mileage and protection . Also use Amsoil Ea oil filter

Signature series has always held the highest protection standards for engine oil. Never an oil problem, and knowing that you are protecting the powerplant for your vehicle is so important nowadays.

I HAVE BEEN USING AMSOIL FOR OVER 20 YEARS ON ALL BOTH OF MY VEHICLES. I HAVE ALWAYS USED THE EXTENDED OIL FILTER SINCEL IT HAS BEEN AVAILABLE. I USE THE SAME OIL CHANGE PEOPLE EACH YEAR. THEY ARE ALWAYS SURPRISED THAT THE OIL IS NOT GRITTY OR THAT IT DID NOT BREAKDOWN . I WILL BE A LIFETIME PREFERRED CUSTOMER OF AMSOIL FOR LIFE.

Whether it's my daily commuter or my weekend toy, I use AMSOIL to protect my vehicle's moving parts and keep it on the road.

Good stuff

O put this oil 5w20 in a 2010 Ford Expedition,in march and it still looks clean great oil pressure,this is August??

I have been using this product from the beginning with my truck. I believe as a result I have not had any major engine trouble or turbo issues even after putting many miles on now

Love this oil. Been using it since the truck was new at 20 miles. Now have 233,000 on it and absolutely no problems with the engine. Oil changes have varied between 10,000 and 18,000 miles. :)

We use this oil in our Ford Fusion. We only put the best of oils in our vehicles and Amsoil makes an amazing product.

I've been an Amsoil Preferred Customer for many years. Have used most all of the Amsoil lubricants and other products at one time or another. Have never been disappointed. Love the way Amsoil continuously improves its products, including this Amsoil Signature motor oil. Try it. You'll be pleased, too!

I have been using Amsoil products for 25 years, and is very satisfied with everything.

The best of the best work here and produce the best of the best products. I would pursue and career here if made possible.

Engine has over 300,000 miles, absolutely no deposits inside as revealed by boroscope, change frequency is 12,000 to 15, 000 miles, 700 hours, this oil is simply the best